Method of feeding plates or sheets to cold rolls.



unirTnD STATES PATENT CHARLES W. BRAY, OI? PITTSBURG, PENSYLVANIA,ASSIGNOR T0 AMERICAN SHEET @a TIN PLATE COMPANY, 0F PITTSBURG,PENNSYLVANIA, A CORPORATION QF NEW JERSEY.

METHOD OIF FEEDING PLATES 0R SHEETS TO COLD ROLLS.

Specification of Letters Patent.

Application fned November 1s, 1505. seriali No. asses?.

To all whom 'it may concern: a

Be it known that I, CHARLES W'. BRAY, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Method of Feeding Plates orSheets to Cold Rolls, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which- Figure 1 isa plan view, partly insection, showing an apparatus for carrying out my method;` and Fig. 2 isan end view.

Plates or sheets are fed to cold rolls by boys or other operators, who,although they become skilled in the operation, frequently feed a plateor sheet before the preceding one has left the rolls. rIhis causes a lapof the platesifor sheets which results in waste.

My invention-is designed to' prevent lapping, and the waste resultingtherefrom, and to avoid the entering of a plate or sheet in the nip ofthe rlls, until the preceding plate or sheet has left such rolls. Tothis end there is provided feeding rolls, normally driven at aslowerperipheral speed than the coldiolls, but arranged to be moved atthesame speed when a plate or sheet is pulled therethrough by thecold-rolls. By means of this arrangement, if a plate is fed. to the feedrolls before a preceding plate has left them, the latter is drawn out ofthe feed- 1 lrolls by the cold-rolls, and the following sheet, owing tothe slower speed of the feedrolls, is not liable `to reach thecold-rolls until the preceding sheet has left them.

In the drawings, 2, 2 designate a pair of cold-rolls, mounted in thehousings, 3, and driven in the usual, or in any suitable manner.

4 and 5 designate two feed-rolls,` placed one above the other in frontof the cold-rolls, and rotatably mounted in suitable bearings 6 on thehousings One of the rolls,-1n the present case the lower one -ispositively rotated by a drivin connection preferably a belt connectionwith a shaft `8,

andthe shafts of the two rolls are interg geared as indicated at 9. Theshaft S'isrotated either by a chain'gear connection 10 with the couplingboX on one of the coldroll shafts, or by--any suitable gear, at suchspeed that the peripheral speed of the rolls il. and 5 will be less thanthe peripheral speed of the cold-rolls. The driving connection for Jtheshaft 8 is preferably made through a suitable clutch 11, 11a, whoseclutch. faces are formed as shown, to permit the clutch member 11a,which is secured to the shaft 8, to slip on the clutch member 11 in onedirection of rotation.

l2 designates guides for the sheets or plates which preferably extendthrough the rolls 4 Patented Jan. 25, i910.

and 5, to admit which the rolls are either out i away, or are made insections secured to a carrying shaft.

The distance between the rolls@ and 5, and the nip of the cold-rolls isless than the length of a plate or sheet, whereby the sheet will becaught by the cold-rolls, before it overlap each other, I preferably useyielding bearings 13 forone of the rolls, in this case the upper roll 4,This allows the feed rolls to yield. as theoverlapping portions passthrough.

Having thus described the invention,what i I claim and desire to secureby Letters-Patent iszf The herein described method which con sists infeeding plates singly and successively to Working rolls between a pairof feed rolls driven at a less peripheral rate of speed than the workingrolls and spaced from said working rollsless than the length of a singlelsheet, the feed rolls being `rotated at a greater rate of speed thantheir `normal rate when engaging a plate which is gripped by both thefeed rolls and the working rolls, whereby successive plates will .beseparated and prevented from being lap-ro`lled should they'become lappedin the feed rolls.

In testnnony whereof, I have hereunto set 100

